[PATCH] ppc64 boot: remove need for imagesize.c

Compute the vmlinux size at runtime.

Use Z_FULL_FLUSH instead of Z_FINISH, to extract only the ELF header
and ELF program header.

 ->p_memsz is the required memory range for the executable, including bss
 ->p_filesz is the size of .text, .data and other runtime sections

These values must be used for the claim call.
All additional memory needed by the kernel is claimed in prom_init, remove
the extra Mb.

Pass the full memsize as target area to gunzip, otherwise not everything
will be uncompressed.

flush_cache has to flush all runtime sections, do not reduce the memrange
by the ->p_offset value because its just that: an offset.

Remove the Makefile code to produce an imagesize.c, its not needed anymore.
Remove all FORCE flags, to not rebuild the zImage if vmlinux was not changed.

Signed-off-by: Olaf Hering <olh@suse.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 11 insertions, 21 deletions

diff --git a/arch/ppc64/boot/Makefile b/arch/ppc64/boot/Makefile
index 3c78d72a84b..d79dfd60d8f 100644
--- a/arch/ppc64/boot/Makefile
+++ b/arch/ppc64/boot/Makefile
@@ -34,7 +34,7 @@ zliblinuxheader := zlib.h zconf.h zutil.h
 $(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
 #$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)
 
-src-boot := crt0.S string.S prom.c main.c imagesize.c div64.S
+src-boot := crt0.S string.S prom.c main.c div64.S
 src-boot += $(zlib)
 src-boot := $(addprefix $(obj)/, $(src-boot))
 obj-boot := $(addsuffix .o, $(basename $(src-boot)))
@@ -87,7 +87,7 @@ src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section)))
 gz-sec  = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section)))
 
 hostprogs-y		:= addnote addRamDisk
-targets 		+= zImage.vmode zImage.initrd.vmode zImage zImage.initrd imagesize.c \
+targets 		+= zImage.vmode zImage.initrd.vmode zImage zImage.initrd \
 			   $(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd))) \
 			   $(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd))) \
 			   $(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd))) \
@@ -100,9 +100,9 @@ quiet_cmd_ramdisk = RAMDISK $@
 quiet_cmd_stripvm = STRIP   $@
       cmd_stripvm = $(STRIP) -s $< -o $@
 
-vmlinux.strip: vmlinux FORCE
+vmlinux.strip: vmlinux
 	$(call if_changed,stripvm)
-$(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz FORCE
+$(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz
 	$(call if_changed,ramdisk)
 
 quiet_cmd_addsection = ADDSEC  $@
@@ -110,48 +110,38 @@ quiet_cmd_addsection = ADDSEC  $@
 		--add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(patsubst %.o,%.gz, $@) \
 		--set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(OBJCOPYFLAGS)
 
-quiet_cmd_imagesize = GENSIZE $@
-      cmd_imagesize = ls -l vmlinux.strip | \
-		awk '{printf "/* generated -- do not edit! */\n" "unsigned long vmlinux_filesize = %d;\n", $$5}' \
-		> $(obj)/imagesize.c && \
-		$(CROSS_COMPILE)nm -n vmlinux | tail -n 1 | \
-		awk '{printf "unsigned long vmlinux_memsize = 0x%s;\n", substr($$1,8)}' >> $(obj)/imagesize.c
-
 quiet_cmd_addnote = ADDNOTE $@
       cmd_addnote = $(obj)/addnote $@
 
-$(call gz-sec, $(required)): $(obj)/kernel-%.gz: % FORCE
+$(call gz-sec, $(required)): $(obj)/kernel-%.gz: %
 	$(call if_changed,gzip)
 
 $(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz
 	cp -f $(obj)/ramdisk.image.gz $@
 
-$(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz FORCE
+$(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz
 	@touch $@
 
-$(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c FORCE
+$(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c
 	$(call if_changed_dep,bootcc)
 	$(call cmd,addsection)
 
 $(obj)/zImage.vmode: obj-boot += $(call obj-sec, $(required))
-$(obj)/zImage.vmode: $(call obj-sec, $(required)) $(obj-boot) FORCE
+$(obj)/zImage.vmode: $(call obj-sec, $(required)) $(obj-boot)
 	$(call cmd,bootld,$(obj-boot))
 
 $(obj)/zImage.initrd.vmode: obj-boot += $(call obj-sec, $(required) $(initrd))
-$(obj)/zImage.initrd.vmode: $(call obj-sec, $(required) $(initrd)) $(obj-boot) FORCE
+$(obj)/zImage.initrd.vmode: $(call obj-sec, $(required) $(initrd)) $(obj-boot)
 	$(call cmd,bootld,$(obj-boot))
 
-$(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote FORCE
+$(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote
 	@cp -f $< $@
 	$(call if_changed,addnote)
 
-$(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote FORCE
+$(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote
 	@cp -f $< $@
 	$(call if_changed,addnote)
 
-$(obj)/imagesize.c: vmlinux.strip
-	$(call cmd,imagesize)
-
 install: $(CONFIGURE) $(BOOTIMAGE)
 	sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)"